21st Century, 21st Century, Vitamin C, Prolonged Release, 1,000 mg, 110 Tablets

Name: 21st Century, Vitamin C, Prolonged Release, 1,000 mg, 110 Tablets
Brand: 21st Century
Rating: 4.8 (3864 reviews)

21st Century, Vitamin C, Prolonged Release, 1,000 mg, 110 Tablets — product photo 1

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Scored for

Outcome alternatives

21st Century110 count • 110 servingsAvailable now$9.49$0.09 / serving4.8 · 3,864 ratings16 / day

87−2 pts from leader

#51 of 4874 ranked for vitamin c statusLeader · Country Life, Country Life, Chewable Acerola, Vitamin C Complex, Berry, 180 Wafers — 89

Why this ranks #51 for vitamin c status

Evidence fitAscorbic Acid is the strongest evidence signal for this outcome.
Dose fitAscorbic Acid at 1000 mg lands inside the studied 50-1000 mg window.
Price / serving$0.09 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustStrong trust signals — consistently high marks from verified buyer ratings.

Trade-offsValue for money trails the rest of this listPopularity trails the other picks here

The numbers · Vitamin C status

What's inside

1000 mgIn rangeinside the studied 50-1000 mg window

Retailer links may be affiliate links. Rankings and placement are not paid placement.

Open at iHerb

Market trends

Price and daily demand history · last 10 crawls

$9.99+0% vs avg

Jul 18Jul 5

16 / day-31% vs avg

Jul 18Jul 5

Rating history

Rating quality and social-proof history · last 10 crawls

4.80 / 5+0% vs avg

Jul 18Jul 5

3,864+4% vs avg

Jul 18Jul 5

By outcome

vs overall leader for each ranked outcome — open any outcome to see its ranked alternatives.

8 outcomes

Show alternatives

Vitamin C statusScoring−2 pts from leader

Product 87Leader 89

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Antioxidant capacity−8 pts from leader

Product 86Leader 94

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Uric acid−5 pts from leader

Product 80Leader 85

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Blood pressure−32 pts from leader

Product 57Leader 89

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Common cold duration−30 pts from leader

Product 56Leader 86

Showing the top 5 of 8 ranked outcomes.

What buyers report

Review Intelligence

4.8/ 5.0 · 3,864 reviews

Neutral read

“Customers consistently praise the high quality and affordability of this vitamin C supplement, noting its effectiveness in boosting the immune system and overall health. The small, easy-to-swallow tablets are particularly appreciated, with many highlighting the lack of aftertaste and gentle effect on the stomach. The prolonged release feature is frequently mentioned as a significant benefit, providing sustained energy and better absorption. Users also commend the reliable delivery service and good packaging. Many have been loyal to this product for years, often taking advantage of promotions to stock up.”

Highlights

Value buy

Good dose

Easy to swallow

Good deal

Immune support

Good for health

Small pills

Energy boost

Observations

Great vitamin C

Convenient packaging

Concerns

No concerns surfaced yet